• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Green Polyurethane from Dimer Acid Based Polyether Polyols: Synthesis and Characterization
【24h】

Green Polyurethane from Dimer Acid Based Polyether Polyols: Synthesis and Characterization

机译：二聚酸基聚醚多元醇制得的绿色聚氨酯：合成与表征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, dimer acid (DA) obtained from waste soybean oil was used together with propylene oxide (PO) to obtain novel polyether polyols [prepolymers for polyurethanes (PUs)] through ring-opening polymerization reaction. The average molecular weight of polyols was estimated by gel permeation chromatography and titration method. The substantial reaction between DA and PO was evident from FTIR and nuclear magnetic resonance spectroscopy. Subsequently, the polyols were reacted with chain extender [ethylene glycol, (EG)] and 4, 4 - Diphenylmethane diisocyanate (MDI) to prepare green PUs. The effect of molar ratio variation of EG and MDI with a fixed amount of polyols was estimated by measuring hydrophobicity and mechanical strength of PUs. The molar ratio such as 1 : 4 : 5.7 of polyol : EG : MDI was found to exhibit maximum hydrophobicity and improved mechanical strength that were comparable with typical PU sample prepared from commercially available polyol, such as polypropylene glycol. FTIR spectroscopic analysis confirmed the chemical changes and possible crosslinking in PUs. Thermalgravimetric analysis and differential scanning calorimetry analysis also showed substantial thermal stability of the green PUs. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41410.
机译：在这项研究中，从废大豆油中获得的二聚酸（DA）与环氧丙烷（PO）一起使用，通过开环聚合反应获得了新型聚醚多元醇[用于聚氨酯（PU）的预聚物]。通过凝胶渗透色谱法和滴定法估计多元醇的平均分子量。 FTIR和核磁共振波谱证明DA和PO之间发生了实质性反应。随后，使多元醇与扩链剂[乙二醇，（EG）]和4，4-二苯基甲烷二异氰酸酯（MDI）反应以制备绿色PU。通过测量PU的疏水性和机械强度，可以估算出EG和MDI摩尔比随固定多元醇的变化而变化的影响。发现多元醇∶EG∶MDI的摩尔比例如1∶4∶5.7与由市售多元醇如聚丙二醇制备的典型PU样品相比具有最大的疏水性和改善的机械强度。 FTIR光谱分析证实了PU中的化学变化和可能的交联。热重分析和差示扫描量热分析也显示出绿色PU的相当大的热稳定性。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41410。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号